
MA-716A
3. Connection
3-4
(3) Checking Connection
Use the communication-checking software to check connection.
(The communication-checking software is for checking receiving, the
communication port and the transmission rate. The bidirectional communication
can not be checked.)
①
Setting of the
MM-122A
Set the communication method of the
MM-122A
.
When connecting with RS-232C, set to [232Fr].
When connecting with RS-485, set to [485Fr].
Set the transmission rate to [9600bps].
For details, see the operation manual for the
MM-122A
.
ATTENTION
・
Do not assign one number to more than one device.
If one number is assigned to more than one device, data collision and
inappropriate system operations may result.
・
RS-232C/RS-485 conversion adopter is user provided.
・
Install a 100
Ω
terminating resistor at each end of RS-485 cable.
・・・・・・・
MM-122A
ID No.1
MM-122A
ID No.31
RS+
RS-
Terminating resistor
100Ω
Host computer
RS-232C/RS-485
conversion adapter
1
2
3
4
5
RS+ 6
RS+
7
8
RS- 9
RS-
D-Sub 9-pin
Male
MM-122A side
Pin No.